oracl 和db2 常用语法比较: 1、取前N条记录 Oracle:Select * from TableName where rownum <= N; DB2:Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle:Select sysdate from dual; DB2:Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle:Select
oracle数据库忽然连不上了,一查是游标数量超了。
1.查看游标数
show parameter open_cursors
2.修改游标数
alter system set open_cursors = 10000;
3.获取打开的游标数
select o.sid, osuser, machine, count(*) num_curs
from v$open_cursor o, v$session s
where user_name = 'AF651_U8'
and o.sid